Assigjstoe of



(No Model) Y A W. R. LAMPTON.

DEVICE POR CONVERTING MOTION.

Patented Peu` 1.2, 1884.

A'rENr i YWILLIAM 'LAMrToNfoF TERRE HAUTE, INDIANA, AssIcNon er` oNE- HALE To WILLIS o..wINN, oE sAME PLACE.

DEVICE FOR CCN SPECIFICATION forming part I Letters vERTlNe MOTION.

raient No. 293,477, dated February 12, 18e/1.

Application filed January 11, 1884. (No model.)

To @ZZ whom, it may concern,.-

Be it known that I, WILLIAM It. LAMPTON, of'Ierre Haute, in the county of Vigo and State of Indiana, have invented certain new 5 and useful Improvements in Mechanical Movements or Devices for Converting Motion; and

I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled inthe `1o art Ato which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of refer- `ence marked thereon, which form part of this specification.

My invention relates to an improvement in mechanical movements or devices for converting motion, whereby without jar or shock a smooth, steady,` and even motionW is given to the workingparts. In the accompanying 2o drawings I have illustrated myimproved move- I ment as applied to the cutter-bar of a mowing-machine but I do not restrict myself to its use in such connection, as it is equally applicable to all machines in which reciprocat- 425 ing motion in a right lineis to be given to one of the working parts.

Referring to the separate iigures, in which like letters indicate like parts, Figure l is a plan view of a mowing-machine to which my 3o invention may be applied. Fig. 2 is a similar view of a part thereof upon an enlarged scale. Fig. 3 is an end View taken on the line x 5v, Fig. 2. The shaft A, carrying an outer cog-wheel, which is connected by suitable gearing to the source of power, is rotated in suitable bearings upon the frame-work of the machine. At its inner end the shaft is provided with a fixed triangular cam of the peculiar form 4o shown in the drawings. The cam revolves between friction-rollers B @supported on brack` ets E E, attached to the cutter-bar. ters of the cam-shaft and friction-roller axles are upon the same line in a single horizontal plane, and the distance between the rollers themselves is that measured by astraight line passing from one of the cam-points through the4 center of the shaft and terminating at the opposite 'cam-edge. IYhen the cam is in the 5o position shown in Fig. 3, `(one point touching the roller B and the opposite concave, the roller 0,) the throw of the cam in the direction of the roller B can be determined by sub-A tracting the distances between the center of the shaft and the points of contact from each other. The throw toward the roller C is the same. The cam is hollowed out or concave upon each ofV its sides. The terminal points are, however, substantially sharp, and between them the concaves have the sides curved in an opposite direction, as shown. ThisI peculiar shaping of the cam is attended with great advantages in the smooth operation of the machine, and, in connection with the bracketed motion without wear or jar than any other with which I am acquainted. In Iny cam-movement there is practically no dead-point, as there would be if the cam were rounded at its ends. The sharply-pointed ends of my cam the direction of rthe throw the moment such point has passed the center of the frictionroller. Thus supposing the cam to be revolving from left to right with reference to Fig. 3: At the beginning of this movement the point 3 moves instantly below the center line of the shaft and rollers,allowing instantaneous move ment of the cutter-bar. If the cam were merely curved, instead of beingpointed, as in my construction, there would be a certain time in which starting from the position of Fig. 3 no motion whatever would be imparted to the cutter-bar, which would be a serious disadvantage. If the sides of the cam, on the other hand, were made merely straight orconcave, and terminating in points, at each change of movement of the cutter-bar there would be a sudden shock or jerk caused by the too-rapid movements of the friction-roller G along the side 2 3. By giving my cam an outward curve this difficulty, as the tendency to a sudden slipping along the face ofthe cam is obviated by the slight resistance offered by the convex at the beginning ofthe movement, while, as above stated, the sharp points permit an instantaneous change in the motion cf the cutter-bar when the cam has reached the outer l limit of its throw. In this way my cam ob or convex on each side of the points, I avoid friction-rollers, insures a more rapid change of 7O permit and insure an instantaneous change in viates all the disadvantages of the old forms, cam shaped, as described, of the bracketed While possessing all their superior qualities. friction-rollers on and in combination with 15 The easy continuous movement of the partsA the reciprocating bar, Wherebya continuous, is greatly assisted by the frietion-rollers,whieh steady, and even rectilinear motion is imparted 5 also prevent Wearing off of the points of the thereto, substantially as described.

cam. In testimony thatI claim the foregoing as my Having thus described my inventiomwhat own Iafxmy signature in presence of two Wit- 2o claim, and desire to secure by Letters Patent, nesses. 1s- T Io In a machine driven by either cog or belt WILLIAM R' LAMPTOA gearing, a mechanical movement or device for Vtnesses: converting motion, consisting` of the combina- JOI-IN C. PENNIE, tion,with the loosely-journaled shaft-bearing, EDWARD E. ELLIS.

Conn tersigned:

BENJ. BU'r'rnnWonTH,

It hereby certified that in Letters Patent N 293,477, granted February 12, 1,884, upon the application of William R. Lenipton, of Terre Heute, Indiana, for en in'iprovenient in Devices for Converting Motion]7 the cleiin was improperly punctuated in the printing thereof, whereby the meaning and intent were changed. Seid cleinl should be read es follon'fsto make the Letters Patent conform tothe record of the case in the Patent Office, VViz: V

In e machine drivenby either` cog or belt gearing, ay mechanical nlovenxent or device for converting` motion, consisting of the combination, with the looselyjourneled shaft, bearing cam shaped as described, of the bracketed friction-rollers on and in i combination with the reciprocating` bar, whereby cv Icontinuons, steady, nnd even rectilinear motion 'is imparted thereto, substantially nsdesoribed.

Signed, eountersigned, ztnd sealed this 19th dey ot'FebrnzLry, A. l). 1884.

[geen] M. L. JosLYN,

Il cting iS'ecrcmrg/ of the Interior.

Cowwniesoncr of Patents. 

